i had written 86 marks in engish instead of 87 in my jac delhi form what should i do?

Hello aspirant,
I am here for helping you.
As you said you have written 86 marks instead of 87 in your JAC Delhi application  form so, intrensically it will not effect your result too much but still if you have provided your roll number then they will consider your marks from official site of result of your respective board so don't need to bother about it because you can't edit it now but still you are in safe zone because officially uploaded marks will be considered.
To know more about JAC Delhi you can go on the link which I am providing you below:
https://engineering-careers360-com.cdn.ampproject.org/v/s/engineering.careers360.com/articles/jac-delhi-application-form/amp?amp_js_v=a2&amp_gsa=1&usqp=mq331AQA#referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s&ampshare=https%3A%2F%2Fengineering.careers360.com%2Farticles%2Fjac-delhi-application-form
I hope it will help you....
For more queries you can upvote me and can ask in the comment box.
Best of luck.

Dear candidate......... hope you're doing good..

Well, any discrepancy or error found in the document at the time of documents verification in the alloted nodal center may lead to rejection of your application as a candidate. So you must produce an affidavit signed by an designated officer or Tehsildar stating the same at the time of verification, otherwise you may not get admission through JAC.  You may also contact the help desk support at the online portal for further assistance.

Hope this helps you out.......

Best of luck:)